高能电子束流引发的横向极化气体氢靶共振退极化研究  

Research on Depolarization of Transversely Polarized Gas Target Induced by High Energy e-Beam

作　　者：王思广[1] 周书华[2] 叶云秀[3] 叶震宇[3] 冒亚军[1] M.Bouwhuis Y.Holler P.Lenisa D.Reggiani H.Marukyan P.Tait 

机构地区：[1]北京大学物理学院 [2]中国原子能科学研究院 [3]中国科学技术大学 [4]Department of Physics,University of Illinois,Urbana,Illinois 61801,USA [5]Desy Deutsches Elektronen-Synchrotron,22603 Hamburg,Germany [6]Istituto Nazionale di Fisica Nucleare,Sezione di Ferrara and Dipartimento di Fisica,Università di Ferrara,44100 Ferrara,Italy [7]Physikalisches Institut Universitüt Erlangen-Nürnberg,91058 Erlangen,Germany [8]Yerevan Physics Institute 375036 Yerevan,Armenia

出　　处：《高能物理与核物理》2006年第9期892-895,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10375002);教育部科学技术研究重大项目(305001);高等学校博士学科点专项科研基金资助~~

摘　　要：对于HERMES横向极化气体氢靶,高能电子束流所激发的高频磁场会引发共振退极化．本文就该极化度下降的产生机制进行研究,并给出σ_(24)共振点发生位置的测量结果,并且将极化靶磁场的强度稳定在远离共振点处,挽回了数据获取时极化度近3%的共振损失．High frequency electromagnetic fields induced by high-energy e-beam can cause resonance depolarization of the HERMES transversely polarized gas target. This paper presents the research results on the mechanism of depolarization and the position where resonance σ24 takes place. About 3% depolarization has been saved after avoiding such resonance by fixing the magnet field far from resonance position according to the measured results.

关 键 词：共振 极化气体靶 极化度 

分 类 号：O571[理学—粒子物理与原子核物理]